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IL. 0. CHEVALIER & H. c. RECHE. ORE CONCENTRATOR APPLICATION FiLEP DEC. 27. I91}?- Patented Aug. 15, 1916'.

2 SHEETS-SHEET I.

MAW.

jnventa rs L. D. ChevaZz'er, 6% #Cifacha A [to rne y.

LFD. CHEVALIIER & H. c. RECHE.

ORE CONCENTRATOR. APPLICATION FILED 050.27.1915.

Patented Aug. 15, 1916.

2 KETS-SHEET 2.

Inventors,

LGD. Chevalier, &

M run a. 7%?

LOUIS DAVID CHEVALIER AND HENRY CHARLES BECHE, 0F DUJBUQUE, IGWA.

ORE-QONCENTRATOR,

filtldlAl'tf.

Application filed December 27, 1915.

To all whom it may concern:

Be it known that we, LOUIS DAVID CHEV- ALIER and HENRY CHARLES RnoHE, citizens of the United States of America, and residents of Dubuque, Dubuque county, Iowa, have invented-certain new and useful Tmprovements in Ore-Concentrators, of which the following is a specification.

Our invention relates to improvements in apparatus for concentrating ore, and the object of our improvement is to furnish a device which shall efi'ectively separate ,the heavier from the lighter ingredients of comminuted ore by the action of mechanical agitation thereof accompanied by the differential movements imparted thereto caused by the employment of air currents moving in various directions. This object we have accomplished by the mechanism which is Figure 1 is a longitudinal vertical section of our improved apparatus. Fig.2 is

a plan view of the oscillating table. Fig. 3 is a perspective view of said tabla. F ig. 4 is a plan view of said table with the cross bars removedaand part of the woven-wire fabric broken away. F ig. 5 is a cross-section of said table taken on the line ccZ of Fig. 2, and Fig. 6 is another. cross-section thereof taken on the line ab of Fig. 2.. Fig. 7 is a detail view of portions of the cross-bars, showin their connecting-means.

Simi' ar numerals of reference denote cor responding parts throughout the several views.

The shallow oscillatory box 1 is of the general form of an oblong with two opposite angles truncated at different degrees of obliquity, the left-hand forward angle being preferably truncated at an angle of 55 degrees, while the opposite rear angle at the right is truncated at an" angle of 35 degrees, but it is to be understood that the box may be difierently formed, as our invention is not dependent in any way upon the shape of the box. 7

Referring first to Fig. 1, the box is in closed at the top by two superposed spaced webs of porous material, the lowermost be,-

-ing preferably a piece of loosely meshed cloth 2, the upper being of woven wire 3. Immediately above these layers are arranged and secured a plurality of spaced longitudinal slots or ribs 4, and upon these ribs are Specification of Letters Patent.

Serial No. 68,791.

arranged and secured another plurality of spaced ribs 5, of less height, but arranged at an angle of 55 degrees of obliquity relat1 ve to the length of the box. The two series of ribs 4 and 5 are secured together by means of riveted twisted plates 36, or by other suitable fastening means, as shown in Fig. 7. The box has a raised border-strip 34 at its rear and left side, the interspaces of said ribs being otherwise uninclosed at the ends, but may be so inclosed all around, if desired.

The box 1 is supported and oscillated by the following means: Pairs of bearing-lugs 11 and 17 are mounted respectively on the box and on a supporting surface underneath and orificed to receive pintles 12 and 18 lo- ]Patented Aug. 15, 191%. I

cated respectively at opposite ends of two part links 13-15, of which the parts 13 are adjustably received and held in the hollows of the tubular parts 15 by set-screws 16. The left-hand parts 13 also are provided with slots 14 through which the pintles 12 pass, permitting some play as required when the box is oscillated by a power-connection at that side, as hereinafter described.

A bracket 19 is fixedly mounted on the left-hand end of the box, and has aneccentrio-strap 20, in which is rotatably seated an eccentric 21 fixed on a horizontal shaft, the latter seated in bearings 23 on the standards 24:, and carrying a belt-wheel 25 for power transmission. Underneath the lefthand end of the box 1 is located a rotary fan 10 having a horizontal conduit 9 carried .under and. to the center of the box. The

bottom of the box is orificed to seat short tubes 7, and rimmed ports are provided in the conduit 9, the said rimmed ports and tubes 7 being connected by flexible col lapsible tubular sections 8, permitting relative motion to the box, while not interfering with the currents of air "carried into the box. At opposite sides and ends of the box orifices are provided to seat the lower ends of inwardly-curved tubes 6 which curve .up- I rear corner of the box 1, through said cover 26. At the middle of said cover is locatedan erect, relatively large conduit 29, bent to one side and providedwith a depressed boxlike part 30, with sloped bottom 32 having a slide 31 for removal of its contents.

' Referring now to Figs. 3, 5. and 6, the

left-hand corner of the cross-ribbed top is elevated more than the middle of the top to induce'gravity to aid in carrying the materials received from the conduit 28 toward the middle of said top. The forward portion of such top is also more elevated than the middle part, while the right hand rear corner part is considerably lower than the right-hand forward corner part, for a purpose to be hereinafter described. The forward edge part of the said top is concavely medially depressed.

The apparatus is particularly deslgned and appropriated for use in localities where there is an abundance of ore, accompanied with a scarcity of water supply.

Operation: When the comminutedore is delivered upon the left-hand rear corner of the grid composed of the cross-ribs 45, and the power applied to oscillate the box 1, the

ore is soon carried over and spread upon the entire top of the grid filling the interspaces of the ribs. The fan being started, vertical air-currents are delivered into the box and pass thence upwardly through the respective interstices of the cloth 2 and the wire netting '3.- Thence the air-currents, as indicated .by the arrows in Fig. 1 penetrate the layer of mixed ore and gangue particles as these are moved and shaken back and-forth,

up and down, and tend to separate them, carrying the lighter particles of the gangue into a layer by itself relatively to a separated or'e layer. The air-currents which pass through the curved tubes 6 are delivered under the hood 26 over the grid, moving oppositely, toward the center, then joining the first-mentioned air-currents in moving upwardly through the pipe -29. Small particles of ore which may have been carried,

through this pipe 29, being heavier than any accompanying small particles of gangue,

tend to fall into the receptacle 30, whence they may be removed by meansof the slide 31 in the inclined bottom 32, such lighter particles'of gangue not falling but being carried away through the pipe to its delivery end. The oscillation of the grid 45 tends to. work the heavier particles toward the claim as new and desire ters Patent, 1s:

lower part of the grid at its depressed righthand rear corner, the overlying lighter particles being thus pushed over to the medially depressed front of the grid whence they fall into a chute 35, shown in Fig. 2. The relatively heavy ore particles after separating and collecting Within the medial'concavity of said grid are discharged along the oblique right-hand side of the grid into a chute 33. The operation of separation is greatly aided by the action of the cross ornorizontal air-currents delivered by the cur Jed tubes 6 across the top of the grid. This stirs up the partially separated mass and helps to propel the overlying layer of lighter particles over the raised forward part of the grid, while gravity acts on the heavier particles to draw them down to the middle and delivery parts of the grid. In the absence of the cross currents of air mentioned, the process would be greatly lengthened and rendered less efficient.

The apparatus may be used to separate any heavy components from lighter materials in a mixture, such as coal from stony particles, or the like, as well as ore.

Various changes ma be effected in the form, arrangement or e enlents of the apparatus described,'without, however, departing from the principles of our invention or the scope of its protection.

Having described our invention, what we to secure by Let- 1. In an apparatus of the character de scribed, an oscillatory reticulated table, means for forcing air upwardly through 'its reticulations and other means for creating opposed horizontal air currents over the upper surface thereof independent of those passing through the retieulations.

2. In anapparatus of the character described, an oscillatory table adapted to receive ore concentrates, separated means for forcing air currents vertically through said concentrates and also in opposed horizontal currents, independent of those which pass vertically through the concentrates, across its upper surface, and an inclosure for said table provided with an air delivery port.

upper surface, and means for passing fluid currents upwardly through the reticulated surface, said reticulated surface being medially concaved and depressed atfoneedge in communication with said concavity to facilitate the discharge of a heavier component of a concentrate moving thereupon.

In an apparatus of the character described, an oscillatory table with reticulated upper surface, and means for passing fluid currents upwardly through the reticulated surface, said reticulated surfacebe'ing meiii 3. In an apparatus of the character described, an oscillatory table with reticulated dially concaved and depressed at each of two delivery edges in communication with said concavity, to respectively separately discharge the heavier and lighter components of a concentrate moving thereupon.

scribed, an oscillatory table in the form of a hollow box whose top is formed of reticulatedv material, cross-bars arranged upon the top of said box obliquely thereto and other cross-bars arranged upon the top of the first-mentioned cross-bars longitudinally, a conduit leading into said box, means for forcing air under pressure through said conduit, and conduits leading from said box to deliver air under pressure over and across the top of said box and the cross-bars thereon in opposite directions.

7. In an apparatus of the character described, an oscillatory table in the form of a hollow box having a reticulated top covered by a network of cross-bars some of which are set obliquely to the length of the box, and others set longitudinally therealong, the bars being downwardly curved to provide a transverse medial depression and a depression atone part at its edge leading thereinto to separate by gravity and discharge the heavier component of mixed concentrates deposited on a raised part of said top, and means adapted to force air through concentrates moving over said top and across its upper surface.

8. Inan apparatus of the: character described, an oscillatory table, means for oscillating said table, a hood supported over said table and provided with a discharge conduit, said table having a reticulated top, means for forcing air upwardly through said top and conduits communicating with said means for concurrently creating op posed cross air currents over the top of the table under said hood directed angularly to the air currents ascending through said reticulated top.

9. In an apparatus of the character described, a longitudinally oscillatory jig having a series of spaced longitudinal division-contrivances therealong, and a series of spaced superposed obliquely arranged dlrr vision contrlvances set across them inclined from a receiving corner of the jig toward the opposite side and corner thereof, both sets of said division-oontrivances being medially concaved in a direction transverse to the direction of the obliquely arranged series thereof.

10. In an apparatus of the character described, a longitudinally oscillatory box,

and a porous cover therefor, a series of spaced longitudinal bars arranged over and upon said cover and another series of medially concaved spaced bars arranged across the first-mentioned bars in a direction angular thereto which is in the line of flow of granular substances therebetween from a place of deposit on one corner of the jig.

Signed at Waterloo, Iowa, this 23d day of November, 1915.

LOUIS DAVID CHEVALIER; HENRY CHARLES ItEOHE. Witnesses:

PEARL M. STANTON, Gno. G. KENNEDY. 

